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A kind of preparation method of die-casting zinc alloy with high hardness and high toughness

A high-toughness, zinc alloy technology, applied in the field of non-ferrous metal processing, can solve problems such as low hardness, poor toughness, and difficulty in meeting industrial needs, and achieve the effect of reducing toughness and increasing hardness

Active Publication Date: 2021-05-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the main problems of die-casting zinc alloys are low hardness and poor toughness, which are difficult to meet industrial needs.

Method used

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  • A kind of preparation method of die-casting zinc alloy with high hardness and high toughness
  • A kind of preparation method of die-casting zinc alloy with high hardness and high toughness
  • A kind of preparation method of die-casting zinc alloy with high hardness and high toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First, put 261.45g of industrial pure zinc, 13.4g of industrial pure aluminum and 6g of Al-50Cu master alloy into a graphite crucible and heat and melt in a well-type electric furnace. The melting temperature is 650°C. Proper stirring is carried out after the alloy is completely melted. , let it stand for 5 minutes, wrap 0.15g of Mg in aluminum foil and dissolve it into the alloy liquid and stir it well. At the same time, 19g of Al-12.6Si master alloy was added to the alloy melt, mixed evenly to obtain Zn-11Al-1Cu-0.05Mg-0.8Si alloy melt, and finally poured into a room temperature metal mold to obtain a diameter of 12 mm. Impact specimens with a length of 80 mm.

[0047] Figure 5 Be the microstructure of Zn-11Al-1Cu-0.05Mg alloy when Si content is 0.8wt.%, compare with comparative example 4 (as Figure 4 As shown), the size of the silicon phase in the alloy structure is significantly reduced.

[0048] Studies have shown that the impact toughness of Zn-11Al-1Cu-0.05M...

Embodiment 2

[0050] First, put 253.85g of industrial pure zinc, 13.4g of industrial pure aluminum and 6g of Al-50Cu master alloy into a graphite crucible and heat and melt in a well-type electric furnace. The melting temperature is 630°C. Proper stirring is carried out after the alloy is completely melted. , let it stand for 5 minutes, wrap 0.15g of Mg in aluminum foil and dissolve it into the alloy liquid and stir it well. At the same time, add 9.7g of Zn-3Ti master alloy into a graphite crucible, control the melting temperature at 540°C, then add 19g of Al-12.6Si alloy and semi-solid Zn-3Ti master alloy into the melt, mix well and pour into Impact specimens with a diameter of 12 mm and a length of 80 mm were obtained in metal molds at room temperature.

[0051] Image 6 When the Si content is 0.8%, the microstructure of the Zn-11Al-1Cu-0.05Mg alloy with a Ti content of 0.1wt.% is compounded, and it can be seen that the grains of the alloy are obviously finer than those without adding Ti...

Embodiment 3

[0054] First, put 233.85g of industrial pure zinc, 13.4g of industrial pure aluminum and 6g of Al-50Cu master alloy into a graphite crucible for heating and melting in a well-type electric furnace. The melting temperature is 650°C. Proper stirring is carried out after the alloy is completely melted. , let it stand for 5 minutes, wrap 0.15g of Mg in aluminum foil and dissolve it into the alloy liquid and stir it well. At the same time, add 29.1g of Zn-3Ti master alloy into another graphite crucible, control the melting temperature at 520°C, then add 19g of Al-12.6Si alloy and semi-solid Zn-3Ti master alloy into the alloy melt and mix well Afterwards, it was poured into a metal mold at room temperature to obtain an impact sample with a diameter of 12 mm and a length of 80 mm.

[0055] Figure 7 When the Si content is 0.8%, the microstructure of the Zn-11Al-1Cu-0.05Mg alloy with a Ti content of 0.3wt.% is added in combination. It can be seen that the microstructure of the alloy ...

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Abstract

The invention belongs to the field of nonferrous metal processing, and discloses a method for preparing a high-hardness and high-toughness die-casting zinc alloy, in particular to a preparation method for improving the mechanical properties of a Zn‑11Al‑1Cu‑0.05Mg die-casting zinc alloy by compounding silicon and titanium . The specific implementation process is as follows: firstly, industrial pure aluminum, industrial pure zinc, industrial pure magnesium and Al-50Cu master alloy are melted in a graphite crucible, and the melting temperature is 600-700°C. At the same time, the Zn-3Ti master alloy is melted in another graphite crucible, and the melting temperature is controlled at 10-80°C below the liquidus line of the alloy. Then, the Al-12.6Si master alloy and the semi-solid Zn-3Ti master alloy are added into the zinc-aluminum-copper-magnesium alloy liquid and fully mixed to prepare a die-cast zinc alloy with higher hardness and toughness.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and in particular relates to a method for preparing Zn-11Al-1Cu-0.05Mg-mSi-nTi die-casting zinc alloy with high hardness and high toughness. Background technique [0002] Zinc-based alloys are called "magic alloys" because of their simple smelting process, excellent mechanical properties, casting properties, processing properties, and outstanding wear resistance. They have become cheap, energy-saving, High quality new material. [0003] Zinc can be alloyed with a variety of non-ferrous metals, the most important of which is brass composed of zinc, copper, tin, lead, etc., and it can also be used to form die-cast alloys with aluminum, magnesium, copper, etc. Zinc is mainly used in iron and steel, metallurgy, machinery, electrical, chemical industry, light industry, military and medicine and other fields. [0004] The development of zinc alloys is primarily due to the invention of the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22C1/03
CPCC22C1/03C22C18/04
Inventor 王建华魏俊成刘赛赛刘亚苏旭平
Owner CHANGZHOU UNIV
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